Reconstructed shadow path and geographic locations of all observers across the continental US. The three lines indicate the shadow path’s northern boundary, centerline, and southern boundary, assuming an elliptical shape for 2007 UK₁₂₆ based on the ellipse fit presented in Fig. 4. The arrows indicate the direction of travel of the shadow on the Earth’s surface from east to west. An animation illustrating the event and the acquired light curves is available online.